Reword and in some cases rewrite introductory text. Describe forthcoming
7.0 release and highlight some key new features. Reviewed by: simon
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Robert Watson
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<!DOCTYPE HTML PUBLIC "-//FreeBSD//DTD HTML 4.01 Transitional-Based Extension//EN" [
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<!ENTITY date "$FreeBSD: www/en/features.sgml,v 1.28 2006/08/19 21:20:30 hrs Exp $">
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<!ENTITY date "$FreeBSD: www/en/features.sgml,v 1.29 2007/03/25 10:21:04 blackend Exp $">
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<!ENTITY title "About FreeBSD's Technological Advances">
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<!ENTITY % navinclude.about "INCLUDE">
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]>
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<h1>FreeBSD offers many advanced features.</h1>
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<p>No matter what the application, you want your system's resources
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performing at their full potential. FreeBSD's advanced features
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enable you to do just that.</p>
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performing at their full potential. FreeBSD's focus on
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performance, networking, and storage combine with easy system
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administration and excellent documentation to allow you to do just
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that.</p>
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<h2>A complete operating system based on 4.4BSD.</h2>
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<p>FreeBSD's distinguished roots derive from the latest <b>BSD</b>
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<p>FreeBSD's distinguished roots derive from the <b>BSD</b>
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software releases from the Computer Systems Research Group at the
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University of California, Berkeley. The book <i>The Design and
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Implementation of 4.4BSD Operating System</i>, written by the 4.4BSD
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system architects, thus describes much of FreeBSD's core functionality
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in detail.</p>
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University of California, Berkeley. Over ten years of work have
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put into enhancing BSD, adding industry-leading SMP, multithreading,
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and network performance, as well as new management tools, file
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systems, and security features. As a result, FreeBSD may be found
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across the Internet, the operating system of core router products,
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running root name servers, hosting major web sites, and the
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foundation for widely used desktop operating systems. This is only
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possible because of the diverse and world-wide membership of the
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volunteer FreeBSD Project.</p>
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<p>Drawing on the skills and experience of a diverse and world-wide
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group of volunteer developers, the FreeBSD Project has worked to
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extend the feature set of the 4.4BSD operating system in many ways,
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striving constantly to make each new release of the OS more stable,
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faster and containing new functionality driven by user requests.</p>
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<h2>FreeBSD provides advanced operating system features, making it ideal
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across a range of systems, from embedded environments to high-end
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multiprocessor servers.</h2>
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<h2>FreeBSD provides higher performance,
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greater compatibility with other operating systems and less system
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administration.</h2>
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<p><b>FreeBSD 7.0</b>, due out in late 2007, brings many new features
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as well as performance advancements. With a special focus on storage
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and multiprocessing performance, FreeBSD 7.0 will ship with support
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for Sun's <b>ZFS file system</b> and <b>highly scalable
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multiprocessing performance</b>. Benchmarks have shown that FreeBSD
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provides twice the MySQL and PostgreSQL performance as current Linux
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systems on 8-core servers.</p>
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<ul>
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<li><b>SMPng</b>: After seven year's of development on advanced SMP
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support, FreeBSD 7.0 realized the goals of a fine-grained kernel
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allowing linear scalability to over 8 CPU cores for many workloads.
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FreeBSD 7.0 sees an almost complete elimination of the Giant Lock,
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removing it from the CAM storage layer and NFS client, moving
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towards more fine-grained locking in the network subsystem.
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Significant work has also been performed to optimize kernel
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scheduling and locking primitives, and the optional ULE scheduler
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allows thread CPU affinity and per-CPU run queues to reduce
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overhead and increase cache-friendliness. Benchmarks reveal a
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dramatic performance advantage over other &unix; operating systems
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on identical multicore hardware, and reflect a long investment in
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new SMP technology for the FreeBSD kernel.</li>
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<li><b>ZFS filesystem</b>: Sun's ZFS is a state-of-the-art file
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system offering simple administration, transactional semantics,
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end-to-end data integrity, and immense scalability. From
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self-healing to built-in compression, raid, snapshots, and volume
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management, ZFS will allow FreeBSD system administrators to easily
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manage large storage arrays.</li>
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<li><b>10gbps network optimization</b>: With optimized device drivers
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from all major 10gbps network vendors, FreeBSD 7.0 has seen
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extensive optimization of the network stack for high performance
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workloads, including auto-scaling socket buffers, TCP Segment
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Offload (TSO), Large Receive Offload (LRO), direct network stack
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dispatch, and load balancing of TCP/IP workloads over multiple CPUs
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on supporting 10gbps cards or when multiple network interfaces are
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in use simultaneously. Full vendor support is available from
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Chelsio, Intel, Myricom, and Neterion.</li>
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<li><b>SCTP</b>: FreeBSD 7.0 is the reference implementation for the
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new IETF Stream Control Transmission Protocol (SCTP) protocol,
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intended to support VoIP, telecommunications, and other
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applications with strong reliability and variable quality
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transmission through features such as multi-path delivery,
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fail-over, and multi-streaming.</li>
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<li><b>Wireless</b>: FreeBSD 7.0 ships with significantly enhanced
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wireless support, including high-power Atheros-based cards, new
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drivers for Ralink, Intel, and ZyDAS cards, WPA, background
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scanning and roaming, and 802.11n.</li>
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<li><b>New hardware architectures</b>: FreeBSD 7.0 includes
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significantly improved support for the embedded ARM architecture,
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as well as preliminary support for the Sun Ultrasparc T1
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platform.</li>
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</ul>
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<p>FreeBSD has a long history of advanced operating system feature
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development; you can read about some of these features below:</p>
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<p>FreeBSD's developers attacked some of the more difficult problems in
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operating systems design to give you these advanced features:</p>
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<ul>
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<li><b>A merged virtual memory and filesystem buffer cache</b>
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continuously tunes the amount of memory used for programs and the
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